CAT24C44LI-G datasheet(1/9 Pages) ONSEMI

Part #	CAT24C44LI-G

Description	256-Bit Serial Nonvolatile CMOS Static RAM

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Doc. No. MD-1083, Rev. T

Characteristics subject to change without notice

FEATURES

s Single 5V Supply

s Infinite EEPROM to RAM Recall

s CMOS and TTL Compatible I/O

s Low CMOS Power Consumption:

–Active: 3mA Max.

–Standby: 30

µA Max.

s Power Up/Down Protection

s 10 Year Data Retention

s JEDEC Standard Pinouts:

–8-lead DIP

–8-lead SOIC

s 100,000 Program/Erase Cycles (EEPROM)

s Auto Recall on Power-up

s Commercial, Industrial and Automotive

Temperature Ranges

DESCRIPTION

The CAT24C44 Serial NVRAM is a 256-bit nonvolatile

memory organized as 16 words x 16 bits. The high

speed Static RAM array is bit for bit backed up by a

nonvolatile EEPROM array which allows for easy trans-

fer of data from RAM array to EEPROM (STORE) and

from EEPROM to RAM (RECALL). STORE operations

are completed in 10ms max. and RECALL operations

typically within 1.5

µs. The CAT24C44 features unlim-

ited RAM write operations either through external RAM

writes or internal recalls from EEPROM. Internal false

PIN CONFIGURATION

store protection circuitry prohibits STORE operations

when VCC is less than 3.5V (typical) ensuring EEPROM

data integrity.

The CAT24C44 is manufactured using Catalyst’s ad-

vanced CMOS floating gate technology. It is designed to

endure 100,000 program/erase cycles (EEPROM) and

has a data retention of 10 years. The device is available

in JEDEC approved 8-lead plastic DIP and

SOIC

packages.

PIN FUNCTIONS

Pin Name

Function

SK

Serial Clock

DI

Serial Input

DO

Serial Data Output

CE

Chip Enable

RECALL

Recall

STORE

Store

VCC

+5V

VSS

Ground

SOIC Package ( V)

DI

DO

1

2

3

4

CE

SK

RECALL

VSS

VCC

STORE

8

7

6

5

1

2

3

4

8

7

6

5

CE

SK

DI

DO

VCC

RECALL

VSS

STORE

DIP Package (L)

256-Bit Serial Nonvolatile CMOS Static RAM

CAT24C44

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